The Ratstreet Boys need an opening act for their show, and the Thea Sisters are ready to rock. Unlike her fraidy-mouse brother, Geronimo (the star of his own bestselling series), Thea Stilton is always up for a globetrotting adventure. When she's back home on Mouse Island, she teaches at her alma mater, helping five of her students — Nicky, Colette, Pamela, Paulina, and Violet — go on adventures of their own. In these thrilling chapter books, Thea narrates as the mouselets go around the world solving mysteries, outwitting bad guys, and getting into and out of all sorts of scrapes. Longer and more fact-filled than the Geronimo Stilton stories, Thea Stilton books also feature higher stakes and more heart-pounding action. But as with her brother's books, Thea's adventures include full-color illustrations and fonts that highlight choice words and phrases on each page, helping readers understand how to use strong vocabulary in their own writing.